The relatives of hundreds of patients who died at the Gosport War Memorial Hospital following the use of opioid painkillers have been told a full police investigation will begin, which is likely to take nine months.
Previous investigations by Hampshire Constabulary into the deaths of 92 patients resulted in no charges being brought.
An inquiry found 456 patients died after being given opiate drugs at the hospital between 1987 and 2001.
Families gathered on 30 April at Ferneham Hall in Fareham to hear from Assistant Chief Constable Nick Downing, head of serious crime at Kent and Essex Police.
Speaking at a press conference after the meeting, he promised a "thorough and independent" investigation with a range of offences, including murder, to be considered.
He said: "We need to look at what is new or different to submit to the CPS. I am satisfied that there is new and different material for us to consider.
"Our investigation does not involve suspects. If we prove the causational link we will move to the next phase."
The Gosport Independent Review Panel report, published in June 2018, found there was a "disregard for human life" at the hospital.
If you have a relative who was affected by the Gosport War Memorial Hospital scandal, we may be able to help.